Integrated charging module magnetic attraction coil

Abstract

The utility model relates to wireless charging technical field, and disclose an integrated charging module magnetic attraction coil, including support and installing electromagnetic coil on the support, electromagnetic coil is connected with temperature sensing module group, temperature sensing module group fixed mounting is on the support and bottom fixedly connected with flexible wire harness, still fixedly installed with the adhering layer on the top of electromagnetic coil, and the adhering layer is connected with temperature sensing module group, the present application can aim at the alternating current through the electromagnetic coil when producing the alternating magnetic field that radiates to the four directions, provides low magnetic resistance conduction path for the magnetic force line that scatters, effectively restricts and guides the magnetic flux that originally easy to leak to the upper space to the system inside, on one hand, the electromagnetic interference of outside radiation is greatly reduced, avoids the influence to the normal work of surrounding electronic equipment, solves the problem that traditional wireless charging electromagnetic compatibility is poor.

Description

Technical Field

[0001] This utility model relates to the field of wireless charging technology, specifically to an integrated charging module magnetic coil. Background Technology

[0002] Wireless charging devices are devices that can charge electronic devices without charging cables. They rely on wireless energy transfer technologies such as electromagnetic induction, magnetic resonance, or radio waves, eliminating the need to plug and unplug charging cables. Widely used in smartphones, wireless earphones, smartwatches, tablets, and even electric vehicles, they effectively simplify the charging process and reduce cable wear and tear and storage hassles. The internal wireless charging coil is the key component for energy conversion in wireless charging devices. It is typically made of highly conductive copper and consists of a "transmitter coil" integrated in the charger and a "receiver coil" integrated in the device being charged. During operation, the transmitter coil generates an alternating magnetic field when energized, and the receiver coil, sensing this magnetic field, generates an induced current, which then transfers electrical energy to the device's battery.

[0003] However, due to insufficient electromagnetic shielding, the alternating magnetic field generated by the electromagnetic coil when the existing wireless charging device is working is prone to radiating and spreading in all directions, causing interference to surrounding electronic devices. In some environments with dense electronic devices, the electromagnetic interference radiated by the device can cause signal interruptions in nearby wireless keyboards and Bluetooth headsets. Secondly, when traditional wireless charging modules are installed in a lift-type wireless charging structure, the rigid circuitry used cannot adapt to the up-and-down movement of the bracket, and is prone to breakage and poor contact due to repeated bending, thus failing to meet the dynamic usage requirements of the lift-type structure. Utility Model Content

[0004] (I) Technical problem to be solved: In view of the shortcomings of the existing technology, this utility model provides an integrated charging module magnetic coil, which has the advantage of reducing electromagnetic interference leakage and solves the problem of interference to surrounding equipment caused by insufficient electromagnetic shielding in traditional designs.

[0005] (II) Technical Solution: To achieve the above-mentioned purpose of reducing electromagnetic interference leakage, this utility model provides the following technical solution: an integrated charging module magnetic coil, including a bracket and an electromagnetic coil mounted on the bracket, the electromagnetic coil being connected to a temperature sensing module, the temperature sensing module being fixedly mounted on the bracket and having a flexible wire harness fixedly connected to its bottom, and an attachment layer being fixedly mounted above the electromagnetic coil, the attachment layer being connected to the temperature sensing module.

[0006] Preferably, the bottom of the bracket is provided with a wire harness groove, the flexible wire harness is disposed in the wire harness groove, and telescopic rods for controlling the up and down movement of the bracket are fixedly connected to both ends of the bracket.

[0007] Preferably, an NTC resistor is fixedly disposed on the temperature sensing module.

[0008] Preferably, a magnetic plate base and an aluminum base are further provided between the electromagnetic coil and the bracket. The magnetic plate base is coaxially fixedly connected to the bottom of the electromagnetic coil. A circular positioning boss for limiting the electromagnetic coil is coaxially machined on the upper surface of the magnetic plate base, and an avoidance opening is provided on the magnetic plate base to avoid interference with the temperature sensing module. The aluminum base is coaxially fixedly connected to the bottom of the magnetic plate base, and the aluminum base is fixedly installed above the bracket.

[0009] Preferably, the bracket is provided with a mounting boss along its radial direction, the temperature sensing module is fixedly mounted on the mounting boss, and the adhesive layer is also processed with a connecting contact extending radially thereon, the connecting contact being connected to the temperature sensing module.

[0010] Preferably, the bracket is further equipped with a C-shaped annular magnet array with a notch, the minor diameter of the annular magnet array being larger than the diameter of the electromagnetic coil, and the annular magnet array being connected to the bracket by foam adhesive.

[0011] Preferably, the bracket is provided with a mounting groove for fixing and limiting the electromagnetic coil.

[0012] Preferably, the aluminum base and the bracket are fixedly connected by double-sided adhesive, and the adhesive layer and the electromagnetic coil are fixedly connected by double-sided adhesive.

[0013] Preferably, the attachment layer is an FPC filter plate or an electric field film.

[0014] (III) Beneficial Effects: Compared with the prior art, this utility model provides an integrated charging module magnetic coil, which has the following beneficial effects: 1. This integrated charging module magnetic coil, through the combined use of an attachment layer structure and an electromagnetic coil structure, when the attachment layer uses an FPC filter board, can provide a low magnetic resistance conduction path for the scattered magnetic lines of force generated when alternating current passes through the coil, effectively constraining and guiding the magnetic flux that would otherwise easily leak into the upper space back into the system. On the one hand, this significantly reduces electromagnetic interference radiated externally, avoiding impact on the normal operation of surrounding electronic devices and solving the problem of poor electromagnetic compatibility in traditional wireless charging. On the other hand, when an electric field film is used, the electric field film can form an effective electrostatic shielding layer, preventing external electric fields from interfering with the working state of the electromagnetic coil. At the same time, it can balance the edge electric field generated by the electromagnetic coil, reduce energy leakage, and improve the coupling efficiency and positioning accuracy of magnetic charging.

[0015] 2. This integrated charging module magnetic coil, through the combined use of an attachment layer structure and a temperature sensing module, collects temperature change data generated on the surface of the electromagnetic coil. This temperature change data is transmitted to the temperature sensing module through the radial connection points of the attachment layer, and then transmitted to the external control circuit through the flexible wire harness stored in the wire harness groove at the bottom of the bracket. When the temperature exceeds the safety threshold, the control circuit can adjust the charging power or suspend charging in real time, realizing dynamic overheat protection for the charging module, solving the problem of the lack of real-time temperature control mechanism in traditional wireless charging, and significantly improving the safety and reliability of the charging process. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the magnetic coil of the integrated charging module in this utility model; Figure 2 This is a front view of the structure of the magnetic coil of the integrated charging module in this utility model; Figure 3 This is a top view of the structure of the magnetic coil of the integrated charging module in this utility model; Figure 4 This is a cross-sectional view of the structure of the magnetic coil of the integrated charging module in this utility model; Figure 5 This is an exploded three-dimensional structural diagram of the magnetic coil of the integrated charging module in this utility model. Figure 6 This is a schematic diagram of the temperature sensing module of the integrated charging module magnetic coil in this utility model.

[0017] In the diagram: 1. Bracket; 11. Cable tray; 12. Telescopic rod; 13. Mounting boss; 2. Electromagnetic coil; 3. Temperature sensing module; 31. NTC resistor; 4. Flexible cable harness; 5. Adhesive layer; 51. Connecting contact point; 6. Magnetic sheet base; 61. Positioning boss; 62. Clearance opening; 7. Annular magnet array; 8. Aluminum base. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-6An integrated charging module magnetic coil includes a bracket 1 and an electromagnetic coil 2 mounted on the bracket 1. The electromagnetic coil 2 is connected to a temperature sensing module 3, which can monitor the operating temperature of the electromagnetic coil 2 in real time and accurately. During energy transmission, the electromagnetic coil 2 generates heat due to resistance 31 and core losses. Its temperature change directly reflects the operating status and safety risks. The temperature sensing module 3 provides real-time data for subsequent power regulation. The temperature sensing module 3 is fixedly mounted on the bracket 1 and has a flexible wire harness 4 fixedly connected to its bottom. The flexible wire harness 4 is designed to accommodate the lifting and lowering movement of the bracket 1, ensuring continuous and stable power and signal transmission during dynamic adjustments and avoiding the risk of internal wire breakage caused by repeated bending of ordinary cables. An attachment layer 5 is also fixedly mounted above the electromagnetic coil 2 and connected to the temperature sensing module 3. Specifically, the attachment layer 5 is an FPC filter board or an electric field film. When an FPC filter board is used as the attachment layer 5, it can effectively suppress the high-frequency noise generated during the operation of the electromagnetic coil, preventing it from interfering with sensitive circuits such as the temperature sensing module. It can also filter out common-mode and differential-mode interference on the power lines, improving the overall system stability. When an electric field film is used as the attachment layer 5, it forms an effective electrostatic shielding layer, preventing external electric fields from interfering with the electromagnetic coil's operation. It can also balance the edge electric field generated by the electromagnetic coil, reducing energy leakage and improving the coupling efficiency and positioning accuracy of magnetic charging. Connecting the attachment layer 5 to the temperature sensing module 3 allows heat between the charging device and the electromagnetic coil 2 to be quickly conducted to the attachment layer 5, and then efficiently reported to the temperature sensing module 3 through the connection path of the attachment layer 5. A wire harness groove 11 is also provided at the bottom of the bracket 1. The flexible wire harness 4 is placed within the wire harness groove 11, providing a wiring path for the flexible wire harness 4, allowing it to be orderly fixed and stored, avoiding the risk of the wire harness becoming entangled, interfering with, or being squeezed or sheared by internal moving parts due to random scattering. The bracket 1 is also fixedly connected to both ends with telescopic rods 12 that control the up and down movement of the bracket 1.

[0020] Please see Figures 1-6An NTC resistor 31 is fixedly mounted on the temperature sensing module 3. The NTC resistor 31 can convert minute temperature changes into precise and easily measurable resistance signal changes. A magnetic base 6 and an aluminum base 8 are also provided between the electromagnetic coil 2 and the bracket 1. The magnetic base 6 is coaxially fixedly connected to the bottom of the electromagnetic coil 2. A circular positioning boss 61 for limiting the electromagnetic coil 2 is coaxially machined on the upper surface of the magnetic base 6. Coaxial installation ensures that the magnetic field lines generated by the magnetic base 6 are completely concentric with the electromagnetic field of the coil, maximizing the magnetic flux convergence effect. The magnetic base 6 has a clearance opening 62 to avoid interference with the temperature sensing module 3. The clearance opening 62 is an anti-interference design, reserving necessary physical space for the temperature sensing module 3 or its connection lines, avoiding installation difficulties or component damage due to space conflicts within the compact module. The aluminum base 8 is coaxially fixedly connected to the bottom of the magnetic base 6 and is fixedly mounted above the bracket 1. The extremely high thermal conductivity of aluminum allows it to efficiently absorb the heat generated by the upper coil and magnetic base 6 during operation, and utilizes its large planar area to rapidly diffuse and dissipate the heat laterally into the surrounding air, effectively preventing localized heat accumulation and keeping the temperature of the core heating component within a safe range. The bracket 1 has a radially extending mounting boss 13, on which the temperature sensing module 3 is fixedly mounted. The adhesive layer 5 also has radially extending connecting contacts 51 connected to the temperature sensing module 3. The bracket 1 also houses a C-shaped annular magnet array 7 with a notch, where the C-shaped notch provides physical clearance. The smaller diameter of the annular magnet array 7 is larger than the diameter of the electromagnetic coil 2, and the annular magnet array 7 is connected to the bracket 1 via foam adhesive. The foam adhesive effectively absorbs and buffers external impacts and vibrations, protecting the magnets from breakage due to brittleness. The bracket 1 also has a mounting groove for fixing and limiting the electromagnetic coil 2. The aluminum base 8 and the bracket 1 are fixedly connected by double-sided adhesive, and the adhesive layer 5 and the electromagnetic coil 2 are fixedly connected by double-sided adhesive.

[0021] Please see Figures 1-6During installation, the adhesive layer 5 is first coaxially attached to the electromagnetic coil 2 using double-sided adhesive. The electromagnetic coil 2 is then coaxially mounted on the magnetic base 6 via the positioning boss 61. The bottom of the magnetic base 6 has an aluminum base 8 connected to the bracket 1. The temperature sensing module 3 needs to be pre-installed on the bracket 1, with a flexible wire harness 4 connected to its bottom and fixed via a wire harness groove 11. The magnetic base 6 is then positioned above the aluminum base 8, and the wires on the electromagnetic coil 2 and the contact points 51 on the adhesive layer 5 are soldered to the temperature sensing module 3. During operation, the telescopic rod 12 first adjusts the height of the bracket 1, and the C-shaped annular magnet array 7 on the bracket 1 attracts the device to be charged, guiding the receiving coil of the device to align with the electromagnetic coil 2 fixed in the mounting groove of the bracket 1, ensuring electromagnetic coupling. During charging, the alternating current passing through the coil generates an alternating magnetic field radiating outwards, with its intensity most concentrated near the coil surface. By directly covering the surface of the electromagnetic coil 2 with the attachment layer 5, the signal transmission quality is effectively purified, the electromagnetic interference radiation intensity generated by the high-speed switching of the electromagnetic coil is significantly reduced, and the electromagnetic compatibility of the module is improved. When the attachment layer 5 uses an FPC filter board, it provides a low-resistivity shortcut for the scattered magnetic field lines, effectively confining and guiding the magnetic flux that would otherwise leak into the upper space back into the system. This greatly reduces electromagnetic interference radiated externally, preventing it from affecting surrounding electronic devices. More magnetic field energy is concentrated and directed to the receiving coil, directly improving the charging transmission efficiency and safety, while filtering out harmful electromagnetic interference noise and high-frequency harmonics generated during the wireless charging process. When the attachment layer 5 uses an electric field film, it can form a uniform electrostatic shielding layer on the surface of the electromagnetic coil, effectively isolating electrostatic interference and electric field disturbances from the external environment, providing a clean electromagnetic environment for the stable operation of the coil. When the bracket 1 is raised and lowered by the telescopic rod 12, the bracket 1 synchronously drives the flexible wire harness 4 to move up and down. The flexible wire harness 4 can bend accordingly, so that the electrical signal can be transmitted continuously and stably during the movement of the bracket 1, avoiding the interference problem caused by the use of ordinary rigid cables.

[0022] Please see Figures 1-6The electromagnetic coil 2 is supported by a coaxially fixed magnetic plate base 6 and an aluminum base 8 at its bottom. The magnetic plate base 6 can concentrate the alternating magnetic field generated by the electromagnetic coil 2 after it is energized, enhancing the electromagnetic induction effect with the receiving coil of the device to improve charging efficiency. When the electromagnetic coil 2 is supplied with alternating current to generate an alternating magnetic field, the magnetic plate base 6 provides a low magnetic resistance path for the magnetic field through its high magnetic permeability, effectively constraining and concentrating most of the magnetic lines of force, making them pass more concentratedly through the receiving coil of the device to be charged, reducing the scattering loss of the magnetic field in the air, thereby greatly enhancing the magnetic flux coupling strength between the transmitting coil and the receiving coil and improving the electromagnetic induction efficiency. The aluminum base 8 synchronously conducts the heat generated by the coil during operation, quickly absorbing the heat generated by the winding resistance 31 and magnetic core loss of the electromagnetic coil 2 from the heat source, and dissipating the heat laterally to the surrounding environment through its own surface area, thereby effectively reducing the operating temperature of the coil and avoiding efficiency reduction or equipment damage caused by local overheating. Meanwhile, the temperature sensing module 3, which is fixed on the radial mounting boss 13 of the bracket 1, collects the temperature data of the attachment layer 5 and the electromagnetic coil 2 in real time through the NTC resistor 31 on it. The temperature data is transmitted to the temperature sensing module 3 through the radial connection contact point 51 on the attachment layer 5, and then transmitted to the external control circuit through the flexible wire harness 4 stored in the wire harness groove 11 at the bottom of the bracket 1. If the temperature exceeds the threshold, the control circuit can adjust the charging power or suspend charging in time to achieve overheat protection.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An integrated charging module magnetic coil, comprising a bracket (1) and an electromagnetic coil (2) mounted on the bracket (1), characterized in that: The electromagnetic coil (2) is connected to a temperature sensing module (3). The temperature sensing module (3) is fixedly installed on the bracket (1) and a flexible wire harness (4) is fixedly connected to its bottom. An attachment layer (5) is also fixedly installed above the electromagnetic coil (2). The attachment layer (5) is connected to the temperature sensing module (3).

2. The integrated charging module magnetic coil according to claim 1, characterized in that: The bottom of the bracket (1) is also provided with a wire harness groove (11), and the flexible wire harness (4) is set in the wire harness groove (11). The two ends of the bracket (1) are also fixedly connected with telescopic rods (12) for controlling the up and down movement of the bracket (1).

3. The integrated charging module magnetic coil according to claim 1, characterized in that: An NTC resistor (31) is fixedly installed on the temperature sensing module (3).

4. The integrated charging module magnetic coil according to claim 1, characterized in that: A magnetic base (6) and an aluminum base (8) are also provided between the electromagnetic coil (2) and the bracket (1). The magnetic base (6) is coaxially fixedly connected to the bottom of the electromagnetic coil (2). A circular positioning boss (61) for limiting the electromagnetic coil (2) is coaxially machined on the upper surface of the magnetic base (6). The magnetic base (6) is provided with a clearance opening (62) to avoid interference with the temperature sensing module (3). The aluminum base (8) is coaxially fixedly connected to the bottom of the magnetic base (6) and is fixedly installed above the bracket (1).

5. The integrated charging module magnetic coil according to claim 1, characterized in that: The bracket (1) is provided with a mounting boss (13) along its radial direction. The temperature sensing module (3) is fixedly mounted on the mounting boss (13). The adhesive layer (5) is also processed with a connecting contact (51) extending radially. The connecting contact (51) is connected to the temperature sensing module (3).

6. The integrated charging module magnetic coil according to claim 1, characterized in that: The bracket (1) is also equipped with a C-shaped ring magnet array (7) with a notch. The small diameter of the ring magnet array (7) is larger than the diameter of the electromagnetic coil (2), and the ring magnet array (7) is connected to the bracket (1) by foam adhesive.

7. The integrated charging module magnetic coil according to claim 1, characterized in that: The bracket (1) is provided with a mounting groove for fixing and limiting the electromagnetic coil (2).

8. The integrated charging module magnetic coil according to claim 1, characterized in that: The adhesive layer (5) is fixedly connected to the electromagnetic coil (2) by double-sided adhesive.

9. The integrated charging module magnetic coil according to claim 1, characterized in that: The attachment layer (5) is an FPC filter plate or an electric field film.

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